Against the high temperature and the lack of power switch I simply even done anything.
For too high temperature (50-55 ° C) I have just a 5V fan back glued to the disk that it blows cold air into it.
Vent holes are located on the rear panel. Power gets this then separate from the USB port.
After that the temperature is constantly below 40 ° C. (Cost 3-5 euros)
For the missing power switch at the hardware store, I just bought a plug adapter which is a switch on it.
example
; Qid = 1384891592 & sr = 8-2 & keywords = Schuko + with + switch
All in all super purchase